I've tried the Schaller (yuck, it rattled) and Kent Armstrong (good, but dark...like a giant Fender) and the best was an old Pierre Joseph String Charger.
Looks very Wallace and Grommet, but its a single coil with a more open sound, attaches using strong velcro and the coil can moved around a bit to balance up the sound. I bought it used on here, but they sold me some extra mounting bits (posted form USA) with no hassle. It did fall off once, so the velcro isn't fool proof (you have to make sure its really locked into place).
Look it up? They've made them for a long time, so I guess there are used ones around.